Method of making rings,申请号US19340754938-传众专利搜索

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发明名称	Method of making rings
摘要
申请公布号	US2036801(A)	申请公布日期	1936.04.07
申请号	US19340754938	申请日期	1934.11.27
申请人	FITZGERALD PATRICK J	发明人	FITZGERALD PATRICK J.
分类号	B21D53/16	主分类号	B21D53/16
代理机构		代理人
主权项
地址

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